HD i5 2500K is specific version of Intel HD 3000 graphics that is built into the 'Intel Core i5 2500K' processor. You can only play most of the latest games like Call Of Duty: Modern Warfare 3, Saints Row The Third, Battlefield 3, The Elder Scrolls V: Skyrim on the lowest settings, but you might experience a small lag. Less demanding games will run from medium to high settings.